Term
| What are the limitations of a hme? |
|
Definition
1. Most barely provide the minimum recommended humidity needed for a patient wih a bypassed airway
2. Use only 96 hours
3. Not to be used for patients that are febrile, dehydrated, min ve over 10LPM due to risk of thick secretions |
|
|
Term
|
Definition
Cost & Labor savings less circuit changes elimination of need to drain tubing condensate
Eliminate possible airway burn from excessive humidifier temperatures
Reduced risk of nos. inf.
HMEF's(filter) additional filtration of inhaled air |
|
|
Term
| what effect does moisture have on HME function? |
|
Definition
| Saturation of the HME will lead to increased resistance across the HME |
|
|
Term
| What is the most efficient humidifier high flow? |
|
Definition
|
|
Term
| What is the most efficient low flow humidifier |
|
Definition
|
|
Term
| what effect does temperature have on the unit? |
|
Definition
| as temperature increases, the absolute humidity of gas increases |
|
|
Term
| AARC guidelines for minimum water vapor content (mg/L) that must be provided to patients with artificial airways? |
|
Definition
|
|
Term
| Advantages of a continuous feed system to fill a humidifier |
|
Definition
| decrease risk of nosocomial infections, no need to fill it, which results in saved labor cost |
|
|
Term
| what are the disadvantages of using a continuous feed system to fill a humidifier |
|
Definition
Accidental flooding of unit or it can run dry if feed system fails.
More expensive |
|
|
Term
|
Definition
| Amount of water vapor content of a gas, sometimes called water vapor |
|
|
Term
|
Definition
| The actual content or weight of water present in a given volume of gas and may be expressed g/m3 or mg/L |
|
|
Term
|
Definition
Content / Capacity
comparison of gas sample with its maximum amount that the gas can hold at a given temp |
|
|
Term
|
Definition
| the maximum amt of water that can be held by a gs at body temperature |
|
|
Term
|
Definition
BH= Cap - Cont
difference between the amount of water inspired and water vapor contained in the gas in the lungs |
|
|
Term
|
Definition
| individual free molecules of a substance that exists below its critical temp |
|
|
Term
| Water vapor tension (pressure) |
|
Definition
| varies with temp. temp increases so does pressure due to kinetic activity of the gas molecules |
|
|
Term
|
Definition
|
|
Term
| PH2O water vapor pressure at 37o C |
|
Definition
|
|
Term
|
Definition
|
|
Term
| factors affecting water vapor pressure |
|
Definition
| the normal values are found in gas in the lower resp track as a result of effect upper and lower airway conditioning process for incoming gas from a wide range of ambient conditions |
|
|
Term
| Indications of Humidity Therapy |
|
Definition
Administration of medical gases from a cylinder or pipeline
environmental relative humidity of less than 40% in a patien without lung disease and less than 70% in a patient with lung disease |
|
|
Term
| Therapeutic value of humidifers |
|
Definition
| Takes dry gases and brings them to room air to prevent airway from drying out |
|
|
Term
|
Definition
Uses Bernoulli's principle
Gas exits at a high velocity creating a drop in lateral pressure water is drawn up capillary tube, as it leaves the cap tube it is broken by the gas in to an aerosol, which then evaporates to humidify the gas |
|
|
